Spark-arrester.



G. G. STOUP.

SPARK ARRESTER. APPLICATION FILED JULY 16, 190e.

Patented June '7, 1910:

Z SHEETS-SHEET l,

G. G. STOUP.

SPARK ARRESTBB.. AP'LIoATIpN FILED JULY 1s, 190s.

Patented June 7, 1910.

2 SHEETS-*SHEET 2.

314mm lfoz f 'l V Y I l fumms GEORGE G. STOUP, OF LATROBE, PENNSYLVANIA.

SPARK-ARRESTER.

, To all whom t may concern:

Be it known that I, GEORGE Gr. SToUr, a citizen of the United States, residing at Latrobe, in the county of lVestmoreland, State of Pennsylvania, have invented certain new and useful Improvements in Spark-Arresters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the saine.

This invention relates to spark arrester attachments for smoke stacks, and has for one of its objects to provide a simply constructed device of this character readily attachable to any size of smoke stack and operating eifectually to prevent the escape of sparks, cinders and the like, while at the same time not interfering with the free passage of the smoke, gases and similar products of the combustion.

Another object of the invention is to provide a device of this character which will effect the separation of the larger particles from the smaller particles and thus more eifectually produce the desired results without interfering with the ordinary operation of the stack.

Another obj ect of the invention is to provide a simply constructed device of this character which may be readily attached and detached to adapt the device to stacks of various sizes without material structural chano'es in the device.

TvVlth these and other objects in view the invention consists in an annular member adapted to bear upon the upper edge of the stack and provided with two inverted conical shaped screen devices of different sizes of mesh, the screen device having t-he larger mesh being the lowest and receiving the first impact of the rising products of the combustion and permitting the smaller particles to pass, while the finer screen device is spaced above the coarser screen device and receives the material which passes through the coarser screen device, and thus effects a separation between the finer and the coarser particles and correspondingly increases the eificiency of the operation.

The invention further consists in certain novel features of construction as hereafter shown and described and then specifically pointed out in the claim, and in the drawings illustrating the preferred embodiment of the invention.

Specification of Letters Patent.

Application led July 16, 1908.

Patented J une 7, 1910.

Serial No. 443,825.

Figure 1 is an enlarged side elevation of a smoke stack partly in section with the improved device applied thereto in elevation. Fig. 2 is a vertical sectional elevation of a smoke stack with the improved device applied, the latter being partly in section. Fig. 3 is a section on the line 3-3 of Fig. 1. Fig. l is an enlarged sectional detail illustrating the manner of connecting the screen device to the annular supporting member.

The improved device may be applied to any form of smoke stack, but is more particularly designed for use in connection with the smoke stacks of locomotives and for the purpose of illustration is shown thus applied, the upper portion of a conventional locomotive smoke stack being represented at 10 with the usual rounded rim 11 at the other end.

rlhe improved device comprises an annu'- lar member 12, preferably of aluminum or other non-corrosive metal and with a concaved under surface to bear over the rim 11 and closely engage the same.

Depending from the inner edge of the annular member 12 are two screen devices represented at 12B-111, the screen device 13 being in relatively elongated inverted conical form and the screen device 14 being also of inverted conical form, but of less length than the screen device 13, so that when connected to the annular member the two screen devices are spaced apart as shown. The mesh of the screen device 13 is coarser than that of the screen device 14 and in practice the meshes of the outer screen device are about one-fourth of an inch in diameter and the meshes of the inner screen device are about one-eighth of an inch in diameter, these dimensions having been found by experiment to accomplish the best results when applied to a locomotive smoke stack, but it will be understood that it is not desired to limit the invention to any specific size of the mesh of the screen devices as these may be varied to suit various circumstances. The lower ends of the screen devices are rounded as shown, and the screens will preferably be produced by pressing a sheet of the screen material by suitable dies or other means into the required shape. The screens will preferably be of aluminum which by its noncorrosive qualities and strength meets the required conditions for a device of this kind which is exposed to both heat and dampness as well as tensile strains produced'by the best position and arrangement tol resist the strains to which they will be subjected.

By connecting the screen devices to the annulark rim 12 the whole device may .be readily attached to land detached 'from the stack and removed l:when requiredor Vthe ,A purpose :of removing the accurnulated parlticles of cindersand soot, and to this end the innerscreenfdevi-ceqle will be attached to the outer `face of the annular member while thescreen device 13 will bel attached Y to the inner face, so that the screen device ll'may-be readily ldetached whenift yisrequired` Ito remove the accumulated 'cinders which have been gathered between the screens. The inner screen is thus spaced yaway from the outer screen a distance equal :to the thickness of the inner wall 'of the member 12, thereby eeotna'lly preventing the clogging of the screens. yByvthis Iarrangement it will be noted 'that the lsidewalls of the outer coarser mesh scren '13 if are inclined slightly to the longitudinal plane of the stack, whillethev inner shorter v finer mesh screen 14 lisincl-ined at ka greater angle to the longitudinal plane of the stack,

so that the space between the screens in-l creases in area downwardly. By thisv means noneu-of thematerial lpassing through the coarser mesh screen will lodge between the two screens, v:but will A'fall into the outer screen, as will be obvious. This is an im- Vportant feature of the invention :and addsj materially :to its utility and eiiciency.

Another important advantage ef the con#E struction'illustrated is found in the fact that vth-e'twopockets or receptacles formed by the :screens lflafreceivethe material and re- The improved device is simple in construc-v tion, canfbe inexpensively manufactured and readily `applied to stacks ofvarying forms and constructions and to stacks of different diameters. Y Y

What is claimed, is In combination with a smoke stack, the herein `described spark arrester comprising a cross-'sectionally concavosconvex kannulus disposed with its concave side lowermost and on the upper end of the stack so that the outer wall of the annulus is without and the inner wall thereof is Within the stack, a lpair of inverted conical screens, concentrically disposed, each Vopen at its upper end and otherwise lclosed from end to end, the inner screen being smaller both diametrically .and longitudinally and being also of smaller mesh than/the Aouter screen and having its open, 1upper end secured to the inner side of the inner wall of said annulus', the said outer, larger screen having its open u pper end secured to the outer side of the inner wall 'of `said vannulus and spaced by said inn-er wall from the inner screen. Y

vln'testimony whereof, I aliiX my signature, yin presence of two Witnesses.

GEORGE G. STOP.

Witnesses: Y

JOHN SHANK, JOSEPH G. MILLER. 

